A mother and child are among those killed by gunmen who threw a hand grenade into the building in Zahedan.

An attack on a courthouse in southeastern Iran’s Sistan-Baluchestan province has killed at least five civilians and injured 13, Iranian media report.

A mother and child were among those killed on Saturday by gunmen who threw a hand grenade into the building in Zahedan, the capital of Sistan-Baluchestan, a senior police official told the state news agency IRNA.

IRNA said three of the attackers were also killed during the assault, citing the regional headquarters of the Islamic Revolutionary Guard Corps (IRGC).

In a statement posted on its Telegram account, Jaish al-Adl (Arabic for Army of Justice), a Baloch armed group based in Pakistan but also active in Iran, claimed responsibility for the attack and urged “all civilians to immediately evacuate the area of clashes for their safety”, Iranian media reported.